Machine for notching sheet metal



(No Model.)

' W. T. ARMSTRONG.

MAGHINE FOR NOTCHING SHEET METAL. v No.280,996. Patented July 10 1883.

WITNESSES:

N. PEIERS. Phulu-Lithagragmr. Wash'mimrx D. c.

UNITED STATES ATENT rricn.

XVALTERT. ARMSTRONG, OF ANDES, NINV YORK.

MACHINE FOR NOTCHING SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 280,996, dated July 10,1883.

Application filed March 19, 1883. (No model.)

To all whom it may concern.-

Be it known that I, VVALTER' T. ARMSTRONG, of Andes, in the county ofDelaware and State of New York, have invented a new and Improved Machinefor Notching Sheet Metal, of which the following is a full, clear, andexact description.

My invention relates to improvements in machines for tinners use for thepurpose of notching or cutting sheet metal in the work of making tin orcopper vessels, cans, &c., in which the sheet has to be notched forforming the corners of the article properly.

The construction and operation are as follows:

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a side perspective view of my machine, and Fig. 2- is avertical transverse section of the same.

A A are standards on a suitable base.

B is a sliding gate held to the standards by cleats a. a, so that thegate may slide vertically.

G O are levers hung on standards A, and connected to the gate by screwspassing through slots in the levers.

d is a rod connected to the inner ends of levers G, and passing downthrough the base for connection to a treadle that will be suitablyarranged "for moving the gate downward. G is a spring for raising thegate upward when the treadle is released.

Upon the cross-bar B of the gate B,- which is of dovetail form, areblocks D D, held in place by tapering bolts e, which allow adjustment ofthe blocks on the bar to and from each other, according to thelength ofthe sheet of metal. On the under sides of blocks, knives or cutters it,of suitable form, are attached;

On a lififllfl'connected to the standards A, at the front of themachine, is attached a table, H, and also two blocks,'F, held in placeby bolts 9, and having upon their upper sides cutters f, correspondingin form to the cutters h. On the blocks F are also attached adjustablegages a, against which the edge of the sheet is placed to regulate thedepth of cut. '1' is a gage on table H for regulainng the length of cut.

In the operation of the machine the blocks D F are adjusted on theirrespective bars according to the length of sheet, and so as to notch atthe corners or on the sides, as may be required. The sheet being placedon the table H and moved up to the gages, the gate is moved down by thetreadle, and the sheet is thus notched at both corners at once. The gatethen rises and the sheet is turned or removed.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The sliding gate B B, with its crossbar 13,carrying movable or adjustable blocks D, provided with cutters 71., saidgate also being acted upon by springs G, in combination with the leversO, with their outer ends pivoted to arms of uprights of the base Aandconnected to the gates upright bars, the. inner ends of said leversbeing connected together and operated by a common rod, (1, as shown anddescribed, and for the purpose set forth.

2. The combination, with the arm-bar WV of the uprights of the base A,said bar extending laterally from the said standards, of the table H,fastened to the arm-bar W, bracketbloclrs.F,.wit-h their upper portionsresting upon the arm-bar W and against the. table H, and their lowerportions extending beneath and adjustable along the arm-bar W, saidtable having a gage, r, at one end, and the blocks F, provided withadjustable gages a.

and cutters f, substantially as and for the purpose set forth.

3. In a machine for notching sheet metal, the uprights of the base A,having the armbar W extending from one side thereof, of the slidingspring-actuated gate B, with its crossbar 13', carrying the adjustableblocks D, provided with cutters 11-, the levers 0, connected to thegate, and with their meeting ends connected to an operating-rod, d, thetable H, having the gage r, and blocks F, carrying the adjustable gagesnand cutters f, and adjustable upon the bar W, substantially as and forthe purpose set forth.

"WALTER T. ARMSTRONG.

lVitncsses:

JAS. F. Soo'rr, Duncan Barman-mun.

